U.S. patent number 5,112,020 [Application Number 07/453,692] was granted by the patent office on 1992-05-12 for keyboard stand.
Invention is credited to Jacob J. Ginsberg.
United States Patent |
5,112,020 |
Ginsberg |
May 12, 1992 |
Keyboard stand
Abstract
The disclosed invention describes a stand used to support a
keyboard in an elevated position. The stand may be adjustable so
that the angle at which the keyboard is positioned may be changed
as desired by the user.
Inventors: |
Ginsberg; Jacob J. (Newtown,
MA) |
Family
ID: |
23801668 |
Appl.
No.: |
07/453,692 |
Filed: |
December 20, 1989 |
Current U.S.
Class: |
248/456; 248/652;
248/921; 248/922 |
Current CPC
Class: |
A47B
21/0314 (20130101); B41J 29/06 (20130101); F16M
11/10 (20130101); A47B 2021/0321 (20130101); Y10S
248/922 (20130101); F16M 2200/024 (20130101); Y10S
248/921 (20130101) |
Current International
Class: |
A47B
21/03 (20060101); A47B 21/00 (20060101); B41J
29/06 (20060101); F16M 11/10 (20060101); F16M
11/02 (20060101); A47G 001/24 () |
Field of
Search: |
;248/456,454,457,919,920,921,922,923,652,653,371,188.9
;108/1,9 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
1357265 |
|
May 1963 |
|
FR |
|
0061948 |
|
May 1968 |
|
DD |
|
Primary Examiner: Ramirez; Ramon O.
Claims
What is claimed is:
1. A stand for altering the angle of a keyboard comprising:
(a) a support for said keyboard;
(b) a means of elevating one side of said support by tilting one
side in an upward manner;
(c) a means for securing said keyboard to said support; and
(d) a means of frictionally stabilizing said stand, wherein said
means of elevation further comprises at least one rigid member
attached pivotally to said means of support, and at least one
second member attached pivotally to said means of support wherein
said first member engages said second member at a point opposite
said pivot.
2. The stand of claim 1 wherein said means of support is a rigid
member forming and angle of less than 90.degree. with said means of
elevation.
3. The stand of claim 1 wherein said angle is between 30 and 45
degrees.
4. A stand for altering the angle of a keyboard comprising:
(a) a support for said keyboard;
(b) an adjustable means of elevating one side of said support by
tilting one side in an upward manner;
(c) a means for securing said keyboard to said support; and
(d) a means of frictionally stabilizing said stand, wherein said
adjustable means of elevating further comprises at least one first
rigid member attached pivotally to said means of support, and at
least one second member attached pivotally to said means of support
wherein said first member engages said second member at a point
opposite said pivot.
5. The stand of claims 1 or 4 wherein said means of securing is a
continuous lip.
6. The stand of claims 1 or 4 wherein said means of frictionally
stabilizing said stand is an elastic foot or elastic boot.
7. The stand of claims 1 or 4 wherein said means of securing is a
discontinuous lip.
8. The stand of claim 4 wherein said adjustable means of elevating
comprises at least two rigid members having multiple perforations,
and being connected with a rigid fastener inserted into said
perforations.
9. The stand of claim 8 wherein said fastener is chosen from the
group comprising a peg, a screw or a thumb nut.
10. The stand of claim 8 wherein said rigid members form a triangle
with said support.
Description
BACKGROUND OF THE INVENTION
1. Introduction
Computer operators and keypunch operators are constantly sitting in
front of terminals for extended periods of time. Without taking
frequent breaks, operators usually complain of aches and pains in
their arms and upper body. Injuries such as carpal tunnel syndrome
and pain in the shoulder, neck, arms and upper body can be traced
to constant use of standard computer keyboards. It is an object of
this invention to provide a means of supporting the keyboard which
alleviates the physical discomfort commonly found with repetitive
use of such keyboards.
2. Discussion of Prior Art
Soft tissue disorders, which include both repetitive motion and
back injuries, currently account for 39 percent of all United
States workers' compensation claims. The annual accounting of
occupational illnesses and injuries, as reviewed in the Nov. 16,
1989 issue of the New York Times (A24), shows that reports of
repetitive motion disorders have risen from 18 percent in 1981 to
48 percent in 1988. People whose jobs entail frequent computer use,
including writers, computer programmers, data entry operators and
administrative personnel are considered at risk for contracting
these disorders. Back and neck pain are common complaints
associated with typing motions for occasional keyboard users. This
type pain can also be associated with the uncomfortable position in
which the hands are held even over short periods of time.
The most common repetitive motion disorder is carpal tunnel
syndrome. It is a nerve condition of the wrist and fingers, often
brought about when computer operators type for hours a day using
repetitive wrist and finger motions without proper support. The
result is damage to the median nerve, which passes from the arm
through the wrist into the hand. The nerve supplies the thumb,
index finger, middle finger and part of the ring finger with
sensation and muscle control. Repeated wrist movements, such as
word processing or data entry without proper support, can cause
swelling and compress the median nerve. Symptoms include tingling
or numb finger, pain in the thumb, index or middle finger, and
aching or weakness in one or both arms. Severe CTS cases are often
correctable only by surgery. Once limited mostly to meat packers,
poultry workers and pianists, it has become a common complaint
among workers who use computers or computerized equipment.
Despite improvements in ergonomic design built into today's
personal computer keyboards, users still face risk of
musculoskeletal injuries directly associated with keyboard use.
These injuries are usually referred to as repetitive strain
injuries and include tendonitis, arthritis, carpal tunnel syndrome
and muscle spasms. These conditions are the result of a combination
of overuse and misalignment of the shoulders, elbows and wrist.
Shoulder and neck injuries among keyboard users is usually
attributed to the table or chair being positioned too high or too
low so that the shoulders are held in a crunch position while
working or arms have to be stretched to reach the keyboard,
resulting in cumulative trauma to the shoulders.
U.S. Pat. No. 4,762,436 discloses a redesigned keyboard with hand
positioning structures to eliminate awkward movements and
contortions in the hand position while operating a standard
keyboard. The hand positioning structures function by the
neuro-sensory process of two point discrimination. With minimal
practice, use of the hand positioning structures quickly functions
at a subconscious reflex level. The hand positioning structures
also provide bio-mechanical balance and symmetry for the fingers
and hands; improves keyboard operation; reduces operator
neuro-muscular stress and fatigue; and facilitates learning how to
operate a keyboard.
U.S. Pat. No. 4,669,903 discloses a redesigned keyboard to reduce
stress on nerves and tendons in the wrist and hands. The redesigned
keyboard evenly divides the keys to be within easy reach of both
hands. Instead of the unbroken array of keys in the standard
keyboard, the center of the keyboard has a V-shaped division that
moves the keys slightly to the left and right. The division places
the hands in a more natural position that reduces strain on hand
tendons.
SUMMARY OF THE INVENTION
Both of the above inventions require an increased economic cost
along with having to relearn typing skills. The present invention
provides a low cost means of reducing physical stress associated
with repetitive typing motions. The article of the present
invention is portable and may be adjusted to any angle considered
to be comfortable for the operator. The adjustable feature allows
the user to change the angle of the keyboard to prevent
continuously holding the hands in any one position for a prolonged
length of time. It also aids in maintaining visual focus on the
display screen and visibility of function keys.
More specifically, this invention relates to a means of supporting
a computer keyboard in a position which is comfortable for the user
and which relieves physical discomfort associated with constantly
sitting in front of a computer screen. It provides a stand for
adjusting the angle of the keyboard so that the hands are not
always in the same position during continued use and the shoulders
are held in a natural relaxed position.
The stand is sturdy so that it absorbs the motion associated with
typing. Also provided is a means of preventing the stand from
sliding side-to-side during typing. The level of adjustment may be
at any angle the user chooses and also provides a means of placing
the keyboard in a more direct line of vision for the user.
While the disclosed invention may be used to support a computer
keyboard, it is also envisioned that the same stand may be used to
support other type keyboards including musical keyboards.
DESCRIPTION OF THE DRAWINGS
The disclosed invention may be illustrated by the following
descriptions of the drawings. The drawings are to be taken as mere
examples and not as limitations to the practice of the
invention.
FIG. 1 is an isometric showing of a stand in accordance with the
embodiments of the invention. It shows a typical stand constructed
from a solid material such as plastic. The stand comprises a
keyboard support (1) to which are pivotally attached bases (2)
equipped with tracks (3) containing recesses for supporting a rigid
member (4) in a fixed position. The rigid member is also pivotally
attached to the support. Adjustment are made to the angle of
elevation by moving the supporting members forward or backward in
the track. The base has attached an elastic foot (5) to provide
frictional stability. The keyboard support may be covered with an
anti-static material or sprayed to provide a means of dissipating
static build-up.
FIG. 2 shows a stand formed from a curved rod (11). This embodiment
is not adjustable since the angle at which the keyboard is held is
fixed. The keyboard is secured to the stand by means of the hooked
portions (12) of the rod. Elastic tubes are used as friction pads
(13) to prevent movement of the keyboard on the stand and of the
stand on the surface on which it is placed.
FIG. 3 illustrates a stand made of one (21) or more (22) semi-rigid
foam wedges. The angle of support for each wedge is fixed, but the
angles may be adjusted by interconnecting two or more wedges of
selected angles. The wedges are connected by means of fasteners
(23), velcro strips or double-faced tape so that the angles are
easily changed. A plastic lip (24) is attached into the bottom
wedge to hold the keyboard in place, however, the keyboard could be
held in place by means of an indentation formed in the top
wedge.
FIGS. 4-7 show other means of elevating or adjusting the height or
angle of the keyboard support. FIG. 4 shows the keyboard support
(31) attached to a rigid member (32) having perforations that align
with perforations in the second rigid member (33). The two rigid
members are then connected using a fastener (34). For stability, a
similar arrangement is located is a similar position on the
opposite end of the keyboard support.
FIG. 5 shows an alternate embodiment of FIG. 4 in which both rigid
members (41) are pivotally attached to the keyboard support (42)
and form an angle (43) with said support. An elastic boot (4) is
placed on the bottom of the lower rigid member for frictional
stability.
FIG. 6 shows the keyboard support (51) attached to a rod (52) which
is inserted into a base (53) containing a threaded perforation (54)
through which a thumb screw (55) is inserted and when tightened
presses against said rod to hold the rod at the desired position.
An elastic boot (56) is placed on the base to provide frictional
stability.
FIG. 7 illustrates a means of adjusting by which the keyboard
support (61) is connected to a vertical member (62) which is
connected to a "u-shaped" member (63) having perforations in the
non-curved surfaces (64) which face each other. A base rod (65) is
inserted through the perforations, said rod having a frictionally
responsive surface which provides a grip for holding the u-shaped
member at the desired position. The angle of support is adjusted by
compressing the bottom part of the u-shaped member and moving it up
or down on the base rod. The base rod has an elastic boot (66) to
make it frictionally stable on the surface on which it sits. The
base rod also has an enlarged end (67) for retention of the rod in
the perforations .
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The stand may be constructed out of any material which does not
interfere with the electrical operation of the keyboard and the
computer. The material may be non-conductive or conductive, if a
means for grounding is provided. The preferred materials include
plastic, wood, and semi-rigid foam.
The stand may be made anti-static by use of anti-static agents
incorporated into the semi-rigid foam or by coating the stand with
an anti-static agent when the stand is made from other materials.
Examples of suitable anti-static coatings are given in U.S. Pat.
Nos. 2,891,878 and 3,914,496, incorporated herein by reference.
The angle between the base of the stand and the supporting member
of the stand may be adjusted from zero degrees to ninety degrees,
as determined by the user. Preferred angles of choice are between
10 and 50 degrees. The most preferred angles being between 35 and
40 degrees.
The means of adjustment may be accomplished by a variety of
techniques. For example, the adjustment may be made by moving the
supporting members forward or backward on a track containing
recessed grooves to hold the supports in a fixed position. When the
stand is constructed in fixed angles, adjustments may be made by
interconnecting more than one stand in stacked positions.
The stand is held in a frictionally stable position on the desk or
table top on which it is placed by means of non-skid materials
which may include semi-rigid foam, urethane or other non-skid
materials placed on the bottom of the stand.
The keyboard is held in place on the stand by means of a lip,
either continuous or discontinuous, placed along the bottom edge of
the support. Other means of securing the keyboard may include
curved hooks when the stand is formed from a curved rod.
* * * * *